I think people generally don't like having to download a specially licensed version of an installer (particularly if you can only do so for a few days) because you can't stick that installer in the spreadsheet/notepad document/whatever it is you keep your list of software license keys in.
Agreed, though some of the outliners/notekeepers, e.g. RightNote
, allow you to embed files inside their databases. From RightNote Help:
Attachment note type
The attachment note type allows you to store any type of file in a RightNote database. For example you can store MS Word documents, Excel files and PDF Documents. If supported, the contents of the file will be indexed and made searchable.
I presume "any type of file" would include .EXEs, or .ZIPs, and even if not, one could MIME/uu-encode them. That would generally make for an awfully large note, though.